How do I run apps in background?

[syndrome]

I have html and js running a worker job to collect records from a server and display on the screen. I wanted this app to poll my server even when running in the background.

I was able to build an example on the PC using a js service worker. But it doesn't seem like MIT App Inventor supports that?

Is it possible to do this in HTML and JS? If not, what else could be used?

[TIMAI2]

Open Source • Background Tasks: Itoo

Itoo 4.4.2 Sky :octopus: Github :gift_heart: Donate [BuildWithLove] [forthebadge] Efficiently designed virtual background execution environment for App Inventor. Powered by the ItooX framework. It allows you to run blocks in background the same way you do normally when the app is active. :star2: Please go through all the details and documentation listed below before you try to use the extension or seek help from others. Efforts have been made to be precise and simple at the …

[syndrome]

Does this Itoo tool allow fetch calls on createProcess block?